Question

find the area and perimeter of a shaded region here ABCD is square of side 21 cm and AED is semicircle (ans 267.75cm2 ,96 cm​

Answer 1

Answer:

First of all we can take the diameter half. You can do it directly also...

12*1/2=6

So we get the radius 6.

Now,

Perimeter of semicircle= πr+(2r)

Let's put the value.

22/7*6 = 29.9

So we get the the answer.

The perimeter of a semicircle with a diameter 12 is 29.6(approx.)